Inputs - 4/20/2015

The facility wide emissions will be displayed on the "Output" sheet. **Facility Profile - User Inputs What is the number of gasoline only refueling positions at your dispensing facility?**  **12**

0

**What is the number of dispensers capable of refueling with either gasoline or diesel?** 0

**What is the number of heavy-duty (HD) truck diesel refueling positions at your facility?** 0

Ozone designation status can be found at http://www.epa.gov/oar/oaqps/greenbk/hindex.html or contact your reviewing authority. nonattainment Enter either **attainment**or **nonattainment**

. **What is the current year? 2014**  Enter the current year (a number between 2013 and 2030). 3/23/2015 

## Potential To Emit Calculator for Gasoline Dispensing Facilities - Inputs **This workbook is designed to calculate the potential to emit of your gasoline dispensing facility.** The gasoline dispensing facility (GDF) owner/operator shall provide two pieces of information. These include whether or not the GDF is in a designated ozone nonattainment area and the number of vehicle refueling positions at the GDF for both gasoline and diesel vehicles. Ozone attainment/nonattainment designation status can be found at http://www.epa.gov/oar/oaqps/greenbk/hindex.html .

**What is the number of automotive/ nonroad diesel only refueling positions at your facility?**

A HD truck (e.g., over the road) refueling position is a single diesel fuel dispenser and its associated nozzle(s). The total number of HD truck refueling positions at your facility is the number of HD trucks that can be refueled simultaneously. These are normally multi-grade dispensers with separate gasoline and diesel fuel nozzles on the same dispenser. These are used primarily to refuel automotive and light truck type vehicles. A vehicle refueling position is a single diesel fuel dispenser and its associated nozzle(s). The total number of automotive/nonroad only diesel refueling positions at your facility is the number of automotive-type vehicles (passenger car, light truck)or nonroad equipment that can be refueled simultaneously. This count would include free standing aboveground tanks used to refuel nonroad equipment. Directions - Enter the facility's information in the yellow-highlighted boxes below.

A vehicle refueling position is a single gasoline dispensing machine and its associated nozzle(s). The total number of vehicle refueling positions at your GDF is the number of gasoline-fueled vehicles that can be refueled simultaneously.Output - Criteria - 4/20/2015

**4.348 Potential to Emit (tons VOC/year)**  

# Potential To Emit Calculator for Gasoline Dispensing Facilities - Outputs

**This facility is located in an ozone nonattainment area.** 3/23/2015Drum - Prod.Crit - 4/20/2015

**HD truck diesel refueling positions** 0 **Automotive dispensers with gasoline or diesel**  0 **Automotive/Nonroad Diesel Refueling Positions**  0 **Gasoline Vehicle Refueling Positions 12**  **Location - Ozone Attainment Status Max. Gasoline Throughput If No**  **Automotive/nonroad Diesel 4,625,280**  **gallons/year 0**  **Max. Combined Automotive plus HD Truck Diesel Throughput**  **0 gallons/year**  **0 Internally fixed values in calculation -- gasoline and automotive/nonroad diesel**  **Internally fixed values -- HD truck diesel** 0.25 hours 24 hours/day 365 days/year 11 gal/refueling event 5 %/year **Gasoline VOC Emissions -- apply these values to GDFs using USTs or ASTs 7**  **Diesel VOC Emissions -- apply these values to GDFs using USTs or ASTs**

Description 4 VOC Emission factor (lb/1,000 gal) Potential to Emit

VOC (tons/yr) Add'l Emissions for Small Volume GDFs 6 12.0 0.000 27.636

Storage Tank Filling 1 0.30 **0.694** Storage Tank Breathing Losses 2 0.25 **0.578**

Dispensing 3 1.33 **3.076 Totals**  **1.880 4.348**  **Methodology**

**Notes:** Emission factors are from AP 42, Chapter 5.2, Transportation and Marketing of Petroleum Liquids, Table 5.2-7, (June 2008), except where noted. Number of gallons per refueling event **Max. Automotive/Nonroad Diesel Throughput**  **Max. HD Truck Diesel** 

# Potential To Emit Calculator for Gasoline Dispensing Facilities

1 Assume Stage 1 controls are in place. 40 CFR 63, Subpart CCCCCC requires that new or modified gasoline dispensing facilities with a monthly throughput greater than 100,000 gallons per month install Stage 1 vapor balance system that achieves a 90% emissions reduction. **Nonattainment Area**

Maximum Throughput (gal/yr) = vehicle refueling positions / refueling event time (hrs) x hours of operation (hr/yr) x fuel dispensed (gal/refueling event) Potential to Emit of VOC (tons/yr) = Maximum Throughput (gal/yr) x VOC Emission Factor (lb/1,000 gal) x 1 ton/2,000 lbs Average time between start of refueling events Number of hours of GDF operation per day Number of days per year open for business Number of gallons per refueling event

Storage Tank Filling Storage Tank Breathing Losses

Dispensing This sheet calculates the maximum fuel throughput, based on the number of vehicle refueling positions at your GDF. The calculations use fixed values for hours of operation, the time required for each refueling event, and the average amount of fuel dispensed per refueling event. The sheet than calculates the emissions of VOC from your GDF, based on emissions factors and the attainment status of your location. Note that while this calculator is designed primarily to address emissions of gasoline vapor, it includes algorithms to account for diesel fuel vapor as well and could even be used if the sole fuel dispensed was diesel.

Average time between start of refueling events Number of hours of GDF operation per day Number of days per year open for business 3/23/2015

Percent of refueling events which use automotive diesel dispensers

**Totals**

4Even though spillage is a specific category of emissions related to fuel dispensing in AP-42, it is considered a fugitive emission for purposes of NSR permits and thus is not included here. 240 CFR 63, Subpart CCCCCC requires that new or modified gasoline dispensing facilities with a monthly throughput greater than 100,000 gallons per month install pressure/vacuum (PV) vent valves on the storage tank vent pipes. This model uses a 75 percent efficiency for PV valves in reducing breathing losses. 3The displacement VOC emission rate in lbs/1000 gallons depends on the gasoline Reid Vapor Pressure, the dispensed fuel temperature, and the difference between the temperature of the fuel in the tank and the dispensed fuel. For these purposes EPA calculated the uncontrolled displacement VOC emission rate in lbs/1000 gallons. EPA has used 10 psi RVP and national average summer-time temperatures for ozone attainment areas. This yields a value of about 10.8 lbs/1000 gallons. EPA has used 7 psi RVP and temperatures representative of the summer-time western US for ozone non-attainment areas. This yields a value of about 7.5 lbs/1000 gallons. In 76 FR 41723, EPA determined that 80% of the vehicle fleet will have ORVR installed as of 2014, and widespread use will be achieved on a national basis on June 30, 2013. Therefore, this value has been reduced by 80% for 2014 and increases each year subsequent to 2014 as fleet turnover occurs. See memorandum to Public Docket EPA-HQ-OAR-2010-1076, Updated Data for ORVR W idespread Use Assessment, Glenn Passavant, OTAQ, 2012 and U.S.EPA, Guidance on Removing Stage II Gasoline Vapor Control Programs from State Implementation Plans and Assessing Comparable Measures, EPA-457/B-12-001, August 7, 2012. Description 4Drum - Prod.Crit - 4/20/2015

**gallons/year gallons/year**  **Internally fixed values -- HD truck diesel**

**Diesel VOC Emissions -- apply these values to GDFs using USTs or ASTs** VOC Emission factor5 (lb/1,000 gal) 0.040 0.028 0.040 **0.108**

Assume Stage 1 controls are in place. 40 CFR 63, Subpart CCCCCC requires that new or modified gasoline dispensing facilities with a monthly throughput greater than 100,000 This sheet calculates the maximum fuel throughput, based on the number of vehicle refueling positions at your GDF. The calculations use fixed values for hours of operation, the time The sheet than calculates the emissions of VOC from your GDF, based on emissions factors and the attainment status of your location. Note that while this calculator is designed primarily to address emissions of gasoline vapor, it includes algorithms to account for diesel fuel vapor as well and could even be used if the sole fuel dispensed was diesel.

Average time between start of refueling events Number of hours of GDF operation per day Number of days per year open for business

Even though spillage is a specific category of emissions related to fuel dispensing in AP-42, it is considered a fugitive emission for purposes of NSR permits and thus is not included 40 CFR 63, Subpart CCCCCC requires that new or modified gasoline dispensing facilities with a monthly throughput greater than 100,000 gallons per month install pressure/vacuum The displacement VOC emission rate in lbs/1000 gallons depends on the gasoline Reid Vapor Pressure, the dispensed fuel temperature, and the difference between the temperature of the fuel in the tank and the dispensed fuel. For these purposes EPA calculated the uncontrolled displacement VOC emission rate in lbs/1000 gallons. EPA has used 10 psi RVP and national average summer-time temperatures for ozone attainment areas. This yields a value of about 10.8 lbs/1000 gallons. EPA has used 7 psi RVP and temperatures representative of the summer-time western US for ozone non-attainment areas. This yields a value of about 7.5 lbs/1000 gallons. In 76 FR 41723, EPA determined that 80% of the vehicle fleet will have ORVR installed as of 2014, and widespread use will be achieved on a national basis on June 30, 2013. Therefore, this value has been reduced by 80% for 2014 and increases U.S.EPA, Guidance on Removing Stage II Gasoline Vapor Control Programs from State Implementation Plans and Assessing Comparable Measures, EPA-457/B-12-001, August 7,